package cn.jantd.core.poi.util;
/**
 * @author 圈哥
 * @version 20171025
 * POI对EXCEL操作工具
 */

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.*;

import cn.jantd.core.constant.CoreConstant;
import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.usermodel.Workbook;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.apache.poi.openxml4j.exceptions.InvalidFormatException;
import org.apache.poi.ss.usermodel.WorkbookFactory;
import org.apache.poi.ss.util.CellRangeAddress;

public class ExcelUtil {

    public static void main(String[] args) {
        //读取excel数据
        ArrayList<Map<String, String>> result = ExcelUtil.readExcelToObj("D:\\上传表.xlsx");
        for (Map<String, String> map : result) {
            System.out.println(map);
        }

    }

    /**
     * 读取excel数据
     *
     * @param path
     */
    public static ArrayList<Map<String, String>> readExcelToObj(String path) {

        Workbook wb = null;
        ArrayList<Map<String, String>> result = null;
        try {
            wb = WorkbookFactory.create(new File(path));
            result = readExcel(wb, 0, 2, 0);
        } catch (InvalidFormatException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return result;
    }

    /**
     * 读取excel文件
     *
     * @param wb
     * @param sheetIndex    sheet页下标：从0开始
     * @param startReadLine 开始读取的行:从0开始
     * @param tailLine      去除最后读取的行
     */
    public static ArrayList<Map<String, String>> readExcel(Workbook wb, int sheetIndex, int startReadLine, int tailLine) {
        Sheet sheet = wb.getSheetAt(sheetIndex);
        Row row = null;
        ArrayList<Map<String, String>> result = new ArrayList<Map<String, String>>();
        for (int i = startReadLine; i < sheet.getLastRowNum() - tailLine + 1; i++) {

            row = sheet.getRow(i);
            Map<String, String> map = new HashMap<String, String>(16);
            for (Cell c : row) {
                String returnStr = "";

                boolean isMerge = isMergedRegion(sheet, i, c.getColumnIndex());
                //判断是否具有合并单元格
                if (isMerge) {
                    String rs = getMergedRegionValue(sheet, row.getRowNum(), c.getColumnIndex());
                    returnStr = rs;
                } else {
                    returnStr = c.getRichStringCellValue().getString();
                }
                if (c.getColumnIndex() == 0) {
                    map.put("id", returnStr);
                } else if (c.getColumnIndex() == 1) {
                    map.put("base", returnStr);
                } else if (c.getColumnIndex() == 2) {
                    map.put("siteName", returnStr);
                } else if (c.getColumnIndex() == 3) {
                    map.put("articleName", returnStr);
                } else if (c.getColumnIndex() == 4) {
                    map.put("mediaName", returnStr);
                } else if (c.getColumnIndex() == 5) {
                    map.put("mediaUrl", returnStr);
                } else if (c.getColumnIndex() == 6) {
                    map.put("newsSource", returnStr);
                } else if (c.getColumnIndex() == 7) {
                    map.put("isRecord", returnStr);
                } else if (c.getColumnIndex() == 8) {
                    map.put("recordTime", returnStr);
                } else if (c.getColumnIndex() == 9) {
                    map.put("remark", returnStr);
                }

            }
            result.add(map);

        }
        return result;

    }

    /**
     * 获取合并单元格的值
     *
     * @param sheet
     * @param row
     * @param column
     * @return
     */
    public static String getMergedRegionValue(Sheet sheet, int row, int column) {
        int sheetMergeCount = sheet.getNumMergedRegions();

        for (int i = 0; i < sheetMergeCount; i++) {
            CellRangeAddress ca = sheet.getMergedRegion(i);
            int firstColumn = ca.getFirstColumn();
            int lastColumn = ca.getLastColumn();
            int firstRow = ca.getFirstRow();
            int lastRow = ca.getLastRow();

            if (row >= firstRow && row <= lastRow) {

                if (column >= firstColumn && column <= lastColumn) {
                    Row fRow = sheet.getRow(firstRow);
                    Cell fCell = fRow.getCell(firstColumn);
                    return getCellValue(fCell);
                }
            }
        }

        return null;
    }

    /**
     * 判断合并了行
     *
     * @param sheet
     * @param row
     * @param column
     * @return
     */
    public static boolean isMergedRow(Sheet sheet, int row, int column) {
        int sheetMergeCount = sheet.getNumMergedRegions();
        for (int i = 0; i < sheetMergeCount; i++) {
            CellRangeAddress range = sheet.getMergedRegion(i);
            int firstColumn = range.getFirstColumn();
            int lastColumn = range.getLastColumn();
            int firstRow = range.getFirstRow();
            int lastRow = range.getLastRow();
            if (row == firstRow && row == lastRow) {
                if (column >= firstColumn && column <= lastColumn) {
                    return true;
                }
            }
        }
        return false;
    }

    /**
     * 判断指定的单元格是否是合并单元格
     *
     * @param sheet
     * @param row    行下标
     * @param column 列下标
     * @return
     */
    public static boolean isMergedRegion(Sheet sheet, int row, int column) {
        int sheetMergeCount = sheet.getNumMergedRegions();
        for (int i = 0; i < sheetMergeCount; i++) {
            CellRangeAddress range = sheet.getMergedRegion(i);
            int firstColumn = range.getFirstColumn();
            int lastColumn = range.getLastColumn();
            int firstRow = range.getFirstRow();
            int lastRow = range.getLastRow();
            if (row >= firstRow && row <= lastRow) {
                if (column >= firstColumn && column <= lastColumn) {
                    return true;
                }
            }
        }
        return false;
    }

    /**
     * 判断sheet页中是否含有合并单元格
     *
     * @param sheet
     * @return
     */
    public static boolean hasMerged(Sheet sheet) {
        return sheet.getNumMergedRegions() > 0 ? true : false;
    }

    /**
     * 合并单元格
     *
     * @param sheet
     * @param firstRow 开始行
     * @param lastRow  结束行
     * @param firstCol 开始列
     * @param lastCol  结束列
     */
    public static void mergeRegion(Sheet sheet, int firstRow, int lastRow, int firstCol, int lastCol) {
        sheet.addMergedRegion(new CellRangeAddress(firstRow, lastRow, firstCol, lastCol));
    }

    /**
     * 获取单元格的值
     *
     * @param cell
     * @return
     */
    public static String getCellValue(Cell cell) {

        if (cell == null) {
            return "";
        }

        if (cell.getCellType() == Cell.CELL_TYPE_STRING) {

            return cell.getStringCellValue();

        } else if (cell.getCellType() == Cell.CELL_TYPE_BOOLEAN) {

            return String.valueOf(cell.getBooleanCellValue());

        } else if (cell.getCellType() == Cell.CELL_TYPE_FORMULA) {

            return cell.getCellFormula();

        } else if (cell.getCellType() == Cell.CELL_TYPE_NUMERIC) {

            return String.valueOf(cell.getNumericCellValue());

        }
        return "";
    }

    /**
     * 数字值，去掉.0后缀
     *
     * @param cell
     * @return
     */
    public static String remove0Suffix(Object value) {
        if (value != null) {
            String val = value.toString();
            if (val.endsWith(CoreConstant.DOT_ZERO)) {
                val = val.replace(".0", "");
            }
            return val;
        }
        return null;
    }

    /**
     * 从excel读取内容
     */
    public static void readContent(String fileName) {
        // 判断是否是excel2007格式
        boolean isE2007 = false;
        if (fileName.endsWith(CoreConstant.EXCEL_XLSX)) {
            isE2007 = true;
        }
        try {
            // 建立输入流
            InputStream input = new FileInputStream(fileName);
            Workbook wb = null;
            // 根据文件格式(2003或者2007)来初始化
            if (isE2007) {
                wb = new XSSFWorkbook(input);
            } else {
                wb = new HSSFWorkbook(input);
            }
            // 获得第一个表单
            Sheet sheet = wb.getSheetAt(0);
            // 获得第一个表单的迭代器
            Iterator<Row> rows = sheet.rowIterator();
            while (rows.hasNext()) {
                // 获得行数据
                Row row = rows.next();
                // 获得行号从0开始
                System.out.println("Row #" + row.getRowNum());
                // 获得第一行的迭代器
                Iterator<Cell> cells = row.cellIterator();
                while (cells.hasNext()) {
                    Cell cell = cells.next();
                    System.out.println("Cell #" + cell.getColumnIndex());
                    // 根据cell中的类型来输出数据
                    switch (cell.getCellType()) {
                        case HSSFCell.CELL_TYPE_NUMERIC:
                            System.out.println(cell.getNumericCellValue());
                            break;
                        case HSSFCell.CELL_TYPE_STRING:
                            System.out.println(cell.getStringCellValue());
                            break;
                        case HSSFCell.CELL_TYPE_BOOLEAN:
                            System.out.println(cell.getBooleanCellValue());
                            break;
                        case HSSFCell.CELL_TYPE_FORMULA:
                            System.out.println(cell.getCellFormula());
                            break;
                        default:
                            System.out.println("unsuported sell type=======" + cell.getCellType());
                            break;
                    }
                }
            }
        } catch (IOException ex) {
            ex.printStackTrace();
        }
    }

}
